Printed pattern defect repair sheet, and repair device and method for printed pattern defect

Abstract

Defects of printed patterns occurring during screen printing are repaired with high efficiency by employing a defect repair sheet in which a material layer for repair is formed on a transparent sheet and an adhesive layer is formed on the transparent sheet in order to cover the material layer for repair. The defect repair sheet is pressed on a defective portion of a predetermined pattern formed on a base by printing, thereby transferring the material layer for repair to the defective portion. The transferred portion is then subjected to, for example, a laser irradiation, so that the adhesive layer transferred together with the material layer for repair is vaporized and the material layer for repair is fired or heated and hence evaporated.

I claim:  
     
       1. A defect repair device for repairing a pattern defect of a material layer that is printed on a base by using a screen plate, said d defect repair device employing a defect repair sheet in which a material layer for repair having a predetermined pattern is formed on a transparent sheet, said defect repair device comprising: 
       alignment means for aligning a pattern of said material layer for repair of said defect repair sheet and a pattern defective portion of said material layer of said base; and  
       transfer means for transferring said material layer for repair to said defective portion by pressing said defect repair sheet on said base from a side on which said material layer for repair is not formed, along a formed pattern of said material layer for repair.  
     
     
       2. The defect repair device of  claim 1 , 
       wherein said defect repair sheet further comprises an adhesive layer formed on said transparent sheet so as to cover said material layer for repair, having an adhesive property to said base which makes it possible to transfer said material layer for repair to said base.  
     
     
       3. The defect repair device of  claim 2 , 
       wherein said adhesive layer includes a layer composed of a material that evaporates in a firing processing which is performed after transferring said material layer for repair and said adhesive layer to a defective portion of said base.  
     
     
       4. The defect repair device of  claim 1 , 
       wherein said alignment means comprises:  
       image taking means that takes an image of said base to obtain an image data of a pattern of said material layer;  
       image processing means that detects a contour of a pattern of said material layer based on said image data and detects whether said pattern has a defect to output a result of image processing; and  
       position adjusting means that, when a defect is present in said pattern of said material layer, adjusts a position of said base so that said defective portion has a certain positional relation with respect to said material layer for repair of said defect repair sheet previously positioned in a predetermined position.  
     
     
       5. The defect repair device of  claim 4 , 
       wherein said image taking means takes, before obtaining said image data, an image of said defect repair sheet from a side on which said material layer for repair is not formed, to obtain a preliminary image data of said predetermined pattern of said material layer for repair that can be seen through said transparent sheet;  
       said image processing means further detects a contour of said predetermined pattern based on said preliminary image data to output a result of a preliminary image processing; and  
       said position adjusting means adjusts, before adjusting a position of said base, a position of said defect repair sheet so that a contour of said predetermined pattern matches said predetermined position, based on said result of preliminary image processing.  
     
     
       6. The defect repair device of  claim 5 , 
       wherein said material layer includes a layer composed of an electrode material.  
     
     
       7. A method for repairing a pattern defect of a material layer that is printed on a base by using a screen plate, said method employing a defect repair sheet in which a material layer for repair having a predetermined pattern is formed on a transparent sheet, said method comprising the step of: 
       pressing said material layer for repair to a defective portion of a pattern of a material layer formed on said base to transfer said material layer for repair to said defective portion; and  
       irradiating laser to said material layer for repair transferred to said defective portion to fire said material layer for repair.  
     
     
       8. The method of  claim 7 , 
       wherein said defect repair sheet further comprises an adhesive layer formed on said transparent sheet so as to cover said material layer for repair, having an adhesive property to said base which makes it possible to transfer said material layer for repair to said base.  
     
     
       9. The method of  claim 8 , 
       wherein said adhesive layer includes a layer composed of a material that evaporates in a firing processing which is performed after transferring said material layer for repair and said adhesive layer to a defective portion of said base.  
     
     
       10. The method of  claim 9 , 
       wherein said material layer includes a layer composed of an electrode material.